Molding apparatus



(No Model.)l L FING-AL 2 Sheets-Sheet 1. MOLDING APPARATUS.

No. 591,463. Patented 001;. 12,1897.

.N umd? wxmsm i@ (No Model.) 2 Sheets-Sheet 2 L. PINGAL.

MOLDING APPARATUS. 110.591,46. Patented Oo't. 12,1897. l g. 3.

. y MW 77M Mw vUNITED STAT-ESV vPATENT FFICE.

LEONARD FINGAL, OF CHICAGO, ILLINOIS.

MOLDING APPARATUS.

SPECIFICATION 'forming' part bf Letters Patent No.`591,4ee, dated october 12, 189'?.

' AppiitatitnfneaApril9,1897. semina 631,345. (remodel.)

To all whom it may concern.-

Beit known that I, LEONARD FINGAL, a citizen of the United States, residing at Chicago, county of Cook, and State of Illinois, have invented a :new and useful Improvement in Molding Apparatus, of which the following is a specification. Y

The object of myinvention is the saving of skilled labor by using a press with power for packing the sand in the flask in making molds for founding purposes instead of the present method of ramming the sand by hand labor, and is particularly adapted for the lighter classes of iron-castin g, especially stove-plate, agricultural implements, and similar castings.

I{lldy device is illustrated inthe accompanying drawings, vin whicl1` Figure 1 ispan elevation of the front of my device. Fig. 2 is a horizontal section on line 2, Fig. 1. Fig. 3 is a longitudinal vertical section on line 3, Fig. 2. Fig. 4 is a top view -of the truck hereinafter described.

Similar letters and gures refer to similar parts throughout the drawings.

In the construction of my device any ordinary ilask may be used, either of wood or of iron, if of uniform size, for each pattern or set of patterns, so that the cope may fit on any nowel, and when the cope is provided with bars to let the edge of the bars be so arranged that they will not interfere in pressing the sand. In this method of founding a greater quantity of loose sand is required than in the present method. To provide for this I use what may be termeda reservoir7 to contain the extra sand. This is simply an addition to the flask placed on top of it, as 5, Fig. 1. It is of the same width and length as the flask to which it belongs and equipped with guide-pins and eyes 'the same as the cope and nowel, the height of the reservoir depending upon the requirements of the pattern to be molded-or the space it will occupy inthe flask.

I construct a truck A, Fig. 4, upon the axles b b of four tram-wheels l l l l, running upon an iron tramway 2 2, Fig. 3.- The rails are shaped like an inverted V, so that the sand will not collect on the track. vThe Wheels are grooved to run thereon. This. truck consists of two cast-iron frames ct and a", the frame 7 a" ntting'inside of frame c, Fig. A. vTil@ inner frame ct" rests on two slides, which run the entire length of the inside of the frame a. Both ends of frame ct are left open, so asto permit the admission and removal of the frame a". The two sides 'of fr ame'ctl contain racks'c c, into the niches of which are laid closely across the truck steel rods, as d d, from one-fourth to three-fourths of an inch in diameter, depending upon the character of work to be done, which rods form a grate in the vbottom of the truck for the purpose of providing a'means of' escape for the surplus sand under pressure. The rods ld el are loose in their receptacles and removable when desired. .The larger the flask used the heavier the rods should be, and the higher the reservoir' the greater the aperturesv between the rods forming the grate to allow the sand to escape more' freely. A piece of sheet-iron B, covering the rods, as shown here, has a large rectangular space, as C, Fig. 4, removed, the object of which is to uncover. the Vrods d d where the pressure is greatest to allow all the superfluous sand to escape when under pressure in forming the mold. The shape of the opening in the sheet-iron cover shall be made in accordance with and follow theshape of the pattern and be adjusted according to its requirements.

When the pattern is irregular in shape or uneven in thickness, so that one portion will reach farther down in the sand than another, the apertures in the grate should be larger at the point underneath that portion, so that the sand may escape more freely there, so that when the pattern reaches its vintended place in the iiask the sand will have obtained its proper consistency.,

InFig. I, e represents the pattern in the flask Gr when the pressure is applied, all the superfluous sand being forced through the apertures between the rods d d underneath.

rIhe press E, Fig. 1, shouldbe made of a size suitable for the class of work required and as large as practicable. The press may be operated either by steam or other means and is provided with guides fitted in the slides 3 3 and arranged so that the truck or carriage can be run under it.

The match-board, to which the pattern e is attached, is provided with guides 4, fitting Ico in slides on the inside of the reservoir, so that no shifting may occur. There should be four or more bolt-holes in the press E, Fig. 1, to secure the match-boards to same. Whenever a pattern is split straight, the halves can be attached to a straight and smooth followboard, but when the pattern is whole or irregular in shape and must be made partly in the cope and partly in the nowel a double match or follow board should be used.

The flask and reservoir are stationary, permitting the match-board with pattern to pass snugly through the reservoir to the edge of the flask and stop there.

In making the mold the flask G, which is provided on each side with bearings orbrackets, rests on two bars G 6, one on each side, these bars 6 G resting on the two ends 7 7 of the outer frame of the truck, so that the flask may almost touch the rods d d. When the mold is pressed and before the pattern is withdrawn, the inner frame a, carrying the rods or grate d d, is shoved out with awooden bottom board, which fits snugly below the flask. The pattern is then withdrawn and the nowel lifted with the bottom board. The object of removing the inner frame a" and replacing it with a bottom board in making the nowel is that the sand must have the board asa support in lifting it from the truck. As the cope is provided with bars for supporting the sand no bottom board for that is required. In making a mold where no escape of sand is needed the grate is removed and the truck covered with a board and the flask placed thereon.

Having thus described my invention, what I claim as new, and desire to protect by Letters Patent, is

1. In a sand-press for founding, the eom- 4o bination of a flask on a truck, a reservoir placed upon the top of the flask for the purpose of holding extra sand for molding, a series of grate-bars under the flask through the apertures of which sand under pressure may escape in forming the mold, and a sheetiron cover for the grate-bars With an opening therein corresponding with the pattern in the flask as and for the purpose above described.

2. In a sand-press for founding, the combination of a east-iron frame open at both ends, carrying a second frame within it which has a rack on each side, into the niches of which are placed steel rods forming a grate in the bodyof the truck, the grate being partially covered by a sheet-iron plate having a portion removed, corresponding to the shape of the pattern in the flask to permit the sand to escape through the grate where the shape of the pattern causes the press to exert the most pressure as and for the purpose specified.

3. In a sand-press the combination of a flask, a reservoir for extra sand placed on top of the flask and which is removed after the mold is pressed, the pattern with its matchboard attached to the press, two frames of cast-iron one Within the other, mounted upon wheels, the outer having open ends, the other having a rack on each side on which are laid steel rods across the truck forming a grate, removable when desired, providing a means of escape for the surplus sand under pressure, the flask resting on two loose bars over the grate, as and for the purpose specified.

LEONARD FINGAL.

fitnesses L. HANKE, HENRY BOEHMER. 

